86573515726821 has 16 divisors (see below), whose sum is σ = 116540627814144. Its totient is φ = 57161810194944.

The previous prime is 86573515726757. The next prime is 86573515726823. The reversal of 86573515726821 is 12862751537568.

It is a happy number.

It is not a de Polignac number, because 86573515726821 - 2⁶ = 86573515726757 is a prime.

It is a super-3 number, since 3×86573515726821³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86573515726823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95774376 + ... + 96674081.

It is an arithmetic number, because the mean of its divisors is an integer number (7283789238384).

Almost surely, 2^{86573515726821} is an apocalyptic number.

It is an amenable number.

86573515726821 is a deficient number, since it is larger than the sum of its proper divisors (29967112087323).

86573515726821 is a wasteful number, since it uses less digits than its factorization.

86573515726821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192449900.

The product of its digits is 169344000, while the sum is 66.

The spelling of 86573515726821 in words is "eighty-six trillion, five hundred seventy-three billion, five hundred fifteen million, seven hundred twenty-six thousand, eight hundred twenty-one".